Antifreeze composition



Patented .F a 6, 1942 EZE COMPOSITION Lionel Bernard, (Camden, N. J.

No Dra mg. Application Feb 26, 1940,

S No. 320,975

This invention relates to an antifreeze composition, and more particularly to a non-corrosive, non-inflammable fluid having a low freezing point and being especially useful in cooling systems or the like.

Many substances have been suggested heretofore for use in antifreeze compositions, and while some of them have been found more or less satisfactory depending upon the particular use to which they have been put, most of them are objectionable for one reason or another. Among the more common substances which have been proposed heretofore are solutions containing alcohol, glycerine, glycols, and mixtures of these substances, as well as solutions of certain metallic chlorides. The alcohols are combustible and readily evaporate; glycerine and glycols are also combustible and are quite expensive; and all these substances are corrosive and creep. To prevent corrosion, various inhibitors have been suggested, but none of these inhibitors has successfully prevented creeping, so far as I am aware, nor have they eliminated the combustibility of these substances.

The primary object of my invention is to provide a novel antifreeze composition which will be entirely free from the aforementioned and other similar defects which characterize the antifreeze compositions of the prior art.

More particularly, it is an object of my invention to provide a novel antifreeze composition which has a low freezing point, which is not I combustible, which will not corrode metals with which it may come in contact, and which will not creep.

Another object of my invention is to provide a novel antifreeze composition which has wide working range between its freezing and boiling points and which is very stable within said range.

Still another object of my invention is to provide a novel antifreeze composition which does not volatilize easily, which has no offensive odor, which does not attack paints or other materials used for coating automobile bodies or the like, and which does not attack rubber, fabrics, or the like.

A further object of my invention is to provide a novel antifreeze composition which is readily soluble in all proportions of water and alcohol.

Still a further object of my invention is to provide a novel antifreeze composition which will not thicken or sludge out on cooling, nor will it boil off or evaporate at normal temperatures.-

It is also an object of my invention to provide a pensive in cost, which is easy to produce, and which is both economical and highly eiilcient in use.

According to my invention, I provide an aqueous solution of a halide of magnesium and a phosphate of ammonium, and add thereto an inhibiting agent consisting of one or more extracts from certain trees or plants and a moss. These ingredients are all readily soluble in water, and when mixed in the correct proportions, they not only provide a solution which has all the advantages noted above, but also provide a very stable composition which may be stored away with safety for considerable periods. I have found that this composition will not jell even when subjected to temperatures as low as 60 F., nor will it evaporate appreciably under 200 F., its boiling point being above that of water and in the neighborhood of 220 F. The inhibiting agent which I employ prevents corrosion of all known metals and alloys, such as aluminum, brass, bronze, steel, cast iron, alloy steels, etc., and the composition is not harmful to automobile finishes, paints, rubber or fabric, whether hot or cold. Since it contains no poisonous metals or other materials and is not combustible, it is entirely safe to use. Moreover, inasmuch as it is soluble in both water and alcohol in all proportions, it may readily be diluted with these solvents, if desired, and in any case, it does not give ofl. any odors which are offensive. Also of interest is the fact that my novel composition has 1 an expansion, when heated, which is similar to that of water.

The novel features that I consider characteristic of my invention are set forth with particularity in the appended claims. The invention itself, however, both as to its composition and manner of production, together with additional objects and advantages thereof, will best be understood from the following description of one embodiment thereof:

Ordinarily, alkali phosphates precipitate insoluble magnesium phosphate from solutions of magnesium salts, but in accordance with my invention, I use an excess of magnesium chloride and thereby prevent the magnesium phosphate from precipitating out.

To make up one gallon of my novel antifreeze solution, I heat four pints and one and one-half ounces of water to a temperature of 110 F. and dissolve therein four pounds and thirteen ounces of magnesium chloride, preferably in crystal form. -In another vessel I heat one pint of water novel antifreeze composition which is very inexto a temperature of F. and dissolve therein I perature; 0.9 gram of Acacia-catechug. 0.0.36 gram of Ourouparia gonzo-M0321.gramotChondrus, i I and 0.245 gram of Tsuga canadensis; When this I has been thoroughly cookedand dissolved, I add this solution. to'the' one prepared as: above. I I 'A composition made up as above is particularly I "useful. in the cooling systems of internal com- I bustion engines; but its use-is ;by no means him. I I

ited thereto-since; it may aiso be used withgreat.

which will no p n .VTV.

I From the foregoing description, it-will be ap- I i parentto those skilled in the: art that I have II provided a novel antifreeze composition which hasmany advantages overthose heretofore avail-- r able; and althoughI-havedesorib'edbut one em- I bodiment thereof, I .am fully aware that: many four ounces of ammonium biphosphate: ithe- I I II monobaslcform being preferred); The ammoni- I urn biphosphate solution is added slowly :to the I magneSium oliloridesoiution whilestirring' con -stantly. I I I I In a separate container, I then prepare the: I I inhibitor byheating to 110. F. 6 .90 on. of: water i and dissolve therein,- by 1 cooking: at this I tem- I other embodiments are possible Thus, it is'nofi I I to be assumed that the specific proportions set. I I I I forth: for theverious ingredients are limiting; 2

. sincethey were cited merely by way ;of example. i I I I Moreover, a numberofothersubstances may be used in :place of I those specifically set :i'orth. I

I desire, therefore; that my invention. shall :not: I I I be limited exceptinsofar as is made necessaryby I l 1 thespirit of theappended claims. I

I 1; An antifreeze composition of I matter oom- I I claim as my invention I l prising an aqueous solution oi' magnesium .ch lo- I advantage in milkIand creampooling units, brew- 1 I I .eryr cooling uni2ts',=in the bottling: of aerated. wa.- I

. ter I and: other bottled iiquids, as a seal. for. gas

I tanks where the fiuiclgis exposed to relatively low: temperatures,- as a protective :fluid in sprinkler, I

systems, and in general as a protective, fluid. I against freezing,: as wellasinhome andindustrial heatingsystem's; By :using an exoessquantity I r of magnesium chloride, es indicated above, creep- I mg of the solution? is gelim inated; and: for this reason; when my novel composition :is used I in I r the cooling system of an internal combustion en- I gine; should any of the; liquid composition leak out onto the engine block, the heat thereof. will dry it out and. leave a dry; insoluble phosphate longer pick up, water and: creep or; I I I I' I Acacia jcltechwnr jQj r m iq m o I Chondrus I ride and ammonium: biphosp-hatein approximately the following proportions: water; 5 pints: and.

' 1 V2 ounces; magnesium chloride, 4 pounds and 13 ounces: and ammonium biphosphate, .4 ounces, I

. and an inhibiting agent for inhibiting corrosion I 1 of metals with which said composition comes in contact, said inhibitingi agent-comprisinga mix-; I I I I .ture of I Acacia I catechu, I Ourouparia gambir, I i I I I I i :Chondrus andTsugn :canadensisin substantially I I I the foilcwving'p rnportic n'ls IperIgallon of solution: I I I I I I i I 2.- An antifreeze composition of I matter c0m' prising an aqueous solution of magnesium ehlo-i I I f ride and a phosphate: of ammonia, the quantity I i of magnesium :chloride present I being: in excess I of that with which the quantity. of ammonium I phosphate present would normally react-to yield I precipitated magnesium phosphate, :and smali I I I I I I I I I I proportions of an inhibitormixture' comprising I I Ac'aeia catechu, Iourouparia gambir, Chondrus andTsugaeanadensiea I I 1 LIONEL BERNARD'.: 

